Free tool
App Store preview checker
Choose your app preview video and see, line by line, whether it meets the technical specifications Apple publishes for App Store previews, and how to fix what does not.
Drop your preview video here
An .mp4, .m4v or .mov file of any size. On an iPhone, pick it from Photos or Files.
Your file stays on this device. This page reads it in your browser, a few bytes at a time, and sends nothing about it anywhere: not the video, not its name, not the result. It still works with your connection switched off once the page has loaded.
What it checks
Every technical requirement on Apple's App preview specifications page that a file can show, as the page stood on 22 October 2026. Where Apple says nothing, the checker says nothing. Two of Apple's figures are targets rather than limits, the video and audio bit rates, so a file away from them is marked Check, not Fix.
| Line | Apple's requirement |
|---|---|
| File type | .mov, .m4v or .mp4 for H.264; .mov for ProRes 422 HQ |
| Video codec | H.264, or ProRes 422 HQ (no other ProRes flavour, no HEVC) |
| H.264 profile | Progressive, up to High Profile Level 4.0 |
| ProRes | Progressive, no external references |
| Resolution | An accepted size: see the next table |
| Frame rate | 30 frames per second at most |
| Length | 15 to 30 seconds |
| File size | 500 MB at most |
| Video bit rate | Target 10 to 12 Mbps for H.264; variable, about 220 Mbps for ProRes |
| Audio | Stereo: one track with two channels, or two one channel tracks, left then right |
| Audio codec | AAC at 256 kbps; with ProRes, also PCM at 16, 24 or 32 bit |
| Sample rate | 44.1 or 48 kHz |
| Tracks | All tracks should be enabled |
The accepted sizes, and the device slots each one fills in App Store Connect. The checker names the slots your file fits.
| Portrait | Landscape | Device slots |
|---|---|---|
| 886 x 1920 | 1920 x 886 | Every iPhone with Face ID or Dynamic Island, and iPhone Duo |
| 1080 x 1920 | 1920 x 1080 | iPhone with Home Button (large display and 4 inch display) |
| 750 x 1334 | 1334 x 750 | iPhone with Home Button (medium display) |
| 1200 x 1600 | 1600 x 1200 | iPad 13, 12.9, 11 and 10.5 inch displays |
| 900 x 1200 | 1200 x 900 | iPad 12.9 and 9.7 inch displays |
| Not accepted | 1920 x 1080 | Mac and Apple TV, landscape only |
| Not accepted | 3840 x 2160 | Apple Vision Pro, landscape only |
It reads the size as the picture is shown, after any rotation the file carries, so a video from an iPhone's Photos is judged upright. The frame rate is measured frame by frame: a screen recording that averages under 30 but runs faster in places is caught. For the full rules, the scaling between device sizes and the recording recipe, read our App Store preview video requirements guide.
What a file check cannot see
App Review judges what the preview shows. These are Apple's own rules for that, from its app previews page and section 2.3 of the App Review Guidelines. Go through them by eye.
- Only the app: "previews may only use video screen captures of the app itself" (guideline 2.3.4).
- No hands or people: "Don't film people interacting with a device, such as an over-the-shoulder angle or fingers tapping the screen."
- Honest transitions: "Ensure that any transitions between scenes don't imply functionality that your app doesn't include."
- The app at its own size: "We recommend capturing the native UI resolution rather than zooming in on the view."
- No prices: "Don't include specific prices, as pricing and currencies vary across regions."
- Nothing that dates: "Avoid any seasonal or timely references that will age your video".
- Say what costs extra: "If you display features that are only available through in-app purchase, or if your app uses a subscription model or requires login, you must disclose this".
- Suitable for everyone: previews must "adhere to a 4+ age rating even if your app is rated higher" (guideline 2.3.8).
- Rights: "Show only material you have the legal right to display".
- No other platforms: "don't include names, icons, or imagery of other mobile platforms or alternative app marketplaces in your app or metadata" (guideline 2.3.10).
Developers also report previews rejected for device frames and for framing around the screen capture; our guide quotes those reports and labels them as reports.
This checker compares a file with Apple's published technical specifications. It cannot tell you App Review will accept a preview: that depends on what the preview shows, and only App Review decides it.
Your file stays with you
The checker runs entirely in your browser. It reads the file's own index, usually well under a megabyte even for a 500 MB file, plus a few bytes of the first frame for ProRes, and works out every figure from those. The video is never uploaded, copied or stored.
This site counts visits to its pages, as its privacy page explains. On this page that count never includes your file, its name, its size or the result, and the site's security settings allow the page to talk to no server but this one.
Sources
Read on 22 October 2026. Apple's help pages show no date of their own.
- Documented Apple, App Store Connect Help, App preview specifications
- Documented Apple, Show more with app previews
- Documented Apple, App Review Guidelines, sections 2.3.4, 2.3.8 and 2.3.10
If you would rather not do it yourself
We make App Store previews from your app's real screens, for USD 200.
Built on your own screen recordings, in Apple's exact sizes, delivered 3 business days after your screen recordings arrive. The storyboard is free, and you pay only if you want the preview.